Method of forming metal hoops



Nov. 28, 1933. c. M. MaccHEsNEY 1,936,909

METHOD OF FORMING METAL HOOPS med May 18, 1951 @j n lz 2z 21 zo 20 Z6 761652 J7 J6 .76@ Je? J7 159 6 Patented Nov. 28, 1933 METHOD 0F FORMINGMETAL HOOPS Chester M. MacChesney, Chicago, Ill., assigner-to Acme SteelCompany, Chicago, Ill., a corporation of Illinois Application May 18,1931. Serial No. 538,093

4 Claims.

This invention relates to improvements in methods of forming metal hoopssuch as those which are employed for reenforcing bands around buttertubs and other containers. Heretofore it has been the usual practice,where such hoops have been formed of metal bands, to secure the ends ofthe band together by means of rivets and this method of fastening hasbeen found objectionable because of the cost of the rivets andinconvenience of applying them and also because they have formedprojections which have interfered with the proper nesting of thefinished tubs one within the other which is a desirable arrangement forshipping purposes. The principal object of the present invention is toovercome these difficulties of prior metal hoops by providing animproved method of forming a hoop by which the overlapping ends of themetal band are secured together in an improved manner without the use ofrivets. Another object is to provide an improved method of uniting theends of a metal band in a manner which permits two ends to be broughttogether and interlocked with each other conveniently and without undueexpense or labor. Other objects relate to various details of theimproved method which will appear more fully hereinafter.

The nature of the invention will be understood from the followingspecication taken with the accompanying drawing, in which one example ofthe improved method is illustrated. In the drawing,

Fig. 1 shows a perspective view of a butter tub having hoops madeaccording to the present invention applied thereto;

Fig. 2 shows a sideelevation of the ends of a metal band which may beemployed in forming' a hoop according to the present invention;

Fig. 3 shows a side elevation of the two ends of the band illustrated inFig. 1 after a succeeding step of the process;

Fig. 4 shows an elevation of the two ends of the band illustrated inFig. 3 after they have been brought together and another step of theprocess performed to prevent relative movement of the ends in onedirection;

Fig. 5 shows an elevation of the two ends of the band after the rpartshave been subjected to a further step of the process to prevent relativemovement of the ends in any direction;

Fig. 6 is a detail vertical section taken on the line 6-6 of Fig. 5; and

Fig. 7 is a detail horizontal section taken on the line 7-7 of Fig. 5.

In Fig. 1 of the drawing, there is illustrated a butter tub 10 made upof a plurality of wooden staves 11 which bear edgewise upon each otherand which are shaped to give an upward ilare to the annular wall of thetub. A metallic hoop 14 is secured around the bottoms of the staves to6. hold the staves together in contact with the bottom of the tub and atspaced intervals above the bottom of the tub there are mounted othersimilar metal hoops 14, constructed according to the method of thepresent invention, which are driven onto the tub from the bottom so thatthey have a tight frictional engagement with the outer surfaces of thestaves.

In forming the hoops 14 according to the present invention, there is rstformed a flat sheet "(0 metal band 15 having one end thereof stamped orcut to form a projecting tongue 16 provided with a semicircular edge16a. The other end of the band is cut away at its upper and lower edgesto form a rectangular tongue 17. After having formed the band as shownin Fig. 2, the upper edge of the band is beaded to form a tubular bead*18 of circular cross-section which extends from the base of the tongue16 to the base of the tongue 17.

The next step of the process consists in overlapping the two ends of theband, as shown in Fig. 4, so that the ends 18a of the bead abut againsteach other while the tongues 16 and 18 extend beneath the beads formedon the respective opposite end portions of the band. The tongue 16 thenoverlaps the body portion of the band adjacent the tongue 17 and thetongue 17 overlaps the body of the band adjacent the base of the tongue16, thus providing a double thickness of metal at the point where theends of the bead come together. After the ends of the band have beenoverlapped, the overlapping portions are punched to form projections 20having the form shown in Figs. 4, 5, 6 and 7. These projections 95 arecurved in transverse cross-section and they are formed by the shearingof the metal of the two overlapping portions on lines extendingtransversely of the band so that the projections have transverseshoulders 202L at their ends which are adapted to abut against thetransverse shoulders formed by the shearing or cutting of the metal,thus preventing the separation of the overlapping ends of the band bymovement of those ends away from each other. After the projections 20have been formed by the punching operation, the lower edge portion 15aof one end of the band is turned upwardly to form a bead 21 whichoverlies the lower edge of the tongue 17 formed on the opposite end ofthe band and the lower edge portion 15b of said last-mentioned end ofthe band is similarly turned up to form a. bead 22 which is similartothe bead 21 which abuts against the end thereof. The abutting ends ofthe beads 21 and 22 and the abutting ends of the bead 18 preventrelative movement of the ends of the band in a direction adapted toincrease the extent of their overlap so that it is impossible to effectsuch a movement for the purpose of disengaging the interlocking partsformed by the projections 2G.

. By means of this invention, the use of rivets, spot welds or othersuch fastening means is eliminated and due to the novel method wherebythe beads 21 and 22 are formed after the relatively narrow tongues 16and 17 have been shaped and inserted beneath the bead 18 on the otherend of the band, the operation of overlapping the ends of the band withthe tongue beneath the bead, may be conveniently effected regardless ofirregularities in the width of the tongue 17. When the ange or bead 21is formed, it may be turned up by a convenient tool into closeengagement with the edge of the tongue 18 regardless of the width ofthis tongue or any irregularities in its surface so that a very secureunion is formed between the two ends of the band before the punchingoperation takes place.

Although one method of forming the improved metal hoop has been shownand described by way of illustration, it will be understood that theinvention may be practiced in various other ways within the scope of theappended claims.

I claim:

1. The method of forming a metal hoop which consists in providing ametal band having a projecting tongue of less width at each end thereof,forming a bead along one edge of said band, then overlapping the endportions of said band with one of said tongues projecting over the bodyportion of the opposite end of the band and beneath the bead on saidopposite end of the band, and then punching said overlapping endportions of the band, to provide an interlocking connection betweenthem.

CERTIFICATE Patent No. 1,936,909.

2. Themethod of forming a metal hoop which consists in providing a metalband, cutting away portions of the opposite edges of said band at oneend thereof to form a projecting tongue, forming a bead along one edgeof said band, then overlapping said tongue and the other end of saidband with said tongue inserted beneath said bead on said other end andwith the ends of said bead engaging each other, then punching theoverlapping tongue and band end to form an interlocking connectionbetween them, and then turning the edge of said other end of said bandover said tongue at the edge thereof opposite said bead.

3. The method of forming a metal hoop which consists in providing ametal band having a projecting tongue of less width at each end thereof,forming a bead along one edge of said band, then overlapping the endportions of said band with each of said tongues projecting over the bodyportion of the opposite end of the band and beneath the bead on saidopposite end of the band, then punching said overlapping end portions ofthe band to provide an interlocking connection between them, and thenturning the lower edge of one end portion of said band upwardly over thelower edge of one of said tongues.

4. The method of forming a metal hoop which consists in providing ametal band, cutting away portions of the opposite edges of said band atboth ends thereof to form two projecting tongues of less width than theband, forming a bead along one edge of said band terminating oppositethe bases of said tongues, then overlapping each of said tongues withthe opposite end portion of said band with one edge of one of saidtongues extending beneath the bead on the opposite end of said band andwith the ends of said beads engaging each other, by which thecircumference of said hoop is determined, then punching the overlappingtongue and band to form an interlocking connection between them, andthen turning the edge of said band opposite that portion of said beadengaged by said tongue over said tongue.

CHESTER M. MACCHESNEY.

0F CORRECTIN.

November 28, 1933.

CHESTER M. MacCHESNEY.

it is hereby certified that error appears above numbered patent 3, for"each" correction therein that the same Patent Office.

in the primed specification ci the Signed and sealed this 26th day ofDecember, A. D. 1933.

(Seal) Richard Spencer Acting ommissioner of Patents.

